contrib/grep/lib/wctomb-impl.h

   1 /* Convert wide character to multibyte character.
   2    Copyright (C) 2011-2015 Free Software Foundation, Inc.
   3    Written by Bruno Haible <bruno@clisp.org>, 2011.
   4
   5    This program is free software: you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 3 of the License, or
   8    (at your option) any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  17
  18 int
  19 wctomb (char *s, wchar_t wc)
  20 {
  21   if (s == NULL)
  22     return 0;
  23   else
  24     {
  25       mbstate_t state;
  26       size_t result;
  27
  28       memset (&state, 0, sizeof (mbstate_t));
  29       result = wcrtomb (s, wc, &state);
  30       if (result == (size_t)-1)
  31         return -1;
  32       return result;
  33     }
  34 }